Vertical adjustment device for burners of gas-cookers



1965 MANYOSHI HlDAKA VERTICAL ADJUSTMENT DEVICE FOR BURNERS OFGAS-COOKERS Filed Feb. 20, 1962 United States Patent 3,169,573 VERTICALADEUSTR BJNT DEVICE 50R BURNERS 6F GAS-COOKERS Manyoshi Hidalta, 3678Z-chome, Minami-cho, Nerima-ku, Tokyo-to, Japan Filed Feb. 2% 1962, Ser.No. 174,537 1 Claim. ((1. 158117) The present invention relates to animproved vertical adjustment device for burners of gas-cookers, in whichthe gas burner is adapted to be vertically adjusted in position ininterlocked action with the opening operation of the cock for the gasinlet tube so that the flame extremities, the combustion temperature ofwhich is the highest, may constantly and automatically strike thesurface to be heated, and the distance of this surface from the burnermay be corrected as to meet the possible particular change in pressurein a local or time-table gas supply program.

In the conventional gas-cookers, it has been proposed to adjustbeforehand the distance of the bottom of the pan or pot from the burneror to adjust the burner vertically in its position, manually, inaccordance with the flame as this is developed in combustion. However,these gas-cookers are very inconvenient, because adjustment of theburners cannot be automatically and effec tively attained.

Furthermore, the conventional manual vertical adjustment device for theburner is based on such mechanism as threads, cogwheels, etc. Moreover,this device necessitates a mechanism for stopping the burner at apredetermined position. i 7

Accordingly, an object of this invention is to provide a verticaladjustment device, wherein the flame extremity where thercombustiontemperature is the highest is always, automatically brought in contactwith the surface to be heated. This object has been attained byproviding a device for carrying out vertical movement of the burner in astate of interlocking with the opening operation of the cock for the gasinlet tube, proportional to the size of opening of the said cock and amechanism for correcting the said vertical movement in response tovariations in the gas pressure.

Another object of this invention is to provide a vertical inclined withthe rotation of thesaid conical cam so as to make the burner move verysmoothly upward or downward.

The mannerin which the foregoing as well as other objects and advantagesof the present inventionmay best be achieved will be understood morefully from consideration of the following description, taken inconnection with 3,169,573 Patented Feb. 16, 1965 ice , pivotallysupported on supports 4, with its one end being the accompanyingdrawing, in which the same or equivalent numbers are designated by thesame numerals and references, and in which: V I

FlG. 1 is a full perspective view bf a preferred embodiment of thepresent invention;

FIG. 2 is a partial longitudinal view, in section, of the burnermounting pat of the embodiment of FIG. 1;.

FIG; 3 is a schematic diagram illustrating the relationof the embodiment.of FIG. I; and, i

V be movable up and down; an equilibrium plate 3 is provided with aweight 5 and the other carrying the burner 1; and guide pieces 6 areassociated with the sides of the burner 1, projections 7'of the burner 1being fitted in guide slots of said guide pieces 6 whereby the burner 1is made to slide up and down freely along the slots by means of a ring 8provided on one end of balance plate 3.

An eccentric conical cm 9 is provided with an axle lever ltl whichpasses eccentrically through the cam 9 so that the cam rotates with theaxle lever 10 and is slidable in the direction of this lever, said lever14 being directly connected to a cock 11. p 7

A screw lever 12 is rotatably mounted in supports 13. The part of thisscrew lever mounted in the supports is threaded and engages acorrespondingly threaded shaft of a movable piece 14. Piece 14 has anend which engages with a circular slot 9a on cam 9 so that the cam ismade to move along lever 1G by the forward or backward movement of piece14. As can more clearly be seen in PEG. 3, at least a portion of lever10 within cam 9 is of rectangular shape and at least a portion of thecorresponding aperture in cam 9 is also of rectangular cross-section.Cam 9 is therefore supported on lever 1:? so that cam 9 can be movedalong lever 10 and can be rotated together with lever 10.

The eccentric conical cam 9 is disposed over the balance plate 3 at aposition between the supports 4 and the weight 5 so that the rotationalmoment of the part of the balance plate 3 on the side of the weight 5 isslightly smaller than that on the side of the burner 1, whereby theeccentric conical cam 9 is made to be always in contact with the screwprojection 15 on the balance plate 3, with the effect that the balanceplate 3 is held at its stop position, and can be slightly inclinedeither leftward or rightward by the rotation of the cam 9, thus causingautomatic up and down movement of the burner 1 with the rotation of thecock 11.

According to the above-described construction, when a gas is suppliedinto the burner 1 through an air mixer cylinder 2 from the gas inlettube 16 by the rightward turning of the cock 11, the eccentric conicalearn 9 rotates rightward while sliding at its periphery on the screwprojection 15, and the part of the balance plate 3 on the side of theweight 5 is made to ascend, thus causing the burner l to descend.

The extent of descent of burner 1 increases in proportion to the extentof opening of the cock Hand reaches the maximum when the cock 11 isopened to its full extent. Accordingly, irrespective of the extent ofopening of the cock H, the flame extremity of the burner 1 is brought incontact with the surface tobe heated.

The length of the flame depends upon the gas pressure .in the gassupply. It is necessary, therefore, to'correct the distance between theburner l and the surface tobe V heated in order to realize the object ofthis invention.

variation ofthe inclined or balanced position. Thus,1the

burner 1 is corrected up or down so that the end of the heme may bebrought into contact with the surface to I be heated;

Although there is a gap at the fitting position between the burner 1andthe air mixer cylinder 2, gas does not escape from said gap becausethe internal diameter of the upper part of the said cylinder 2 isreduced, and; said upper part is tapered. Rather said gap causes inflowof 1 the ambient air. j V i As described above, with the presentinvention, the opening operation of the cock is interlocked with thedescent of the burner 1 in proportion to the extent of opening of thecock so that the extreme tip of the flame is brought in contact withthesurface to be heated. Accordingly, the present invention has a highthermal efficiency and permits economical use of fuels.

The present invention may be used ideally in all cases, since thedistance of the burner and the surface to be heated may be corrected tobe appropriate to the length of the flame by purposely operating thevertical correction device, even if the supply pressure were to bealtered locally or by timetable.

In embodying this invention, it is possible to reduce the frictionbetween the eccentric conical cam 9 and the projection 15 by adjustingthe weight of the weight and reducing the difference between therightside-and leftside rotational moments of the balance plate 3,whereby it is made possible to carry out opening operation of the cock11 almost without resistance. As a whole, the device of this inventionis very simple in its construction and sure in its action.

Although this invention has been described with respect to afew'particular embodiments thereof, it is not to be so limited aschanges and modifications may be made therein which are within the fullintended scope of the invention, as defined by the appended claim.

What is claimed is:

A vertical adjustment device for burners of gas stoves of the typewherein Said burners are fed by an inlet tube controlled 'by a gas cockcomprising in combination;

a balance plate and projection thereto pivotally mounted on supportsdesigned to adjust the burner on one side and having a Weight attachedto the other side of said balance plate, the weight being made tobalance the burner;

a telescoping air mixing chamber coupled to the burner fitted withexternal guide projections, and connecting means between said chamberand the balance plate, the telescopic position of said chamber dependingupon the movement of said balance plate;

a horizontally disposed conical cam, the periphery of its cone beingtransverse to and engaging said balance plate projection;

an axle lever connected to the gas cock passing eccentrically throughsaid cam so that relative rotation of said cam and axle lever isprevented, interlocking said gas cock and balance plate so that saidbalance plate can be inclined to the left or right in response to theopening of the gas cock; and,

a a screw lever disposed parallel to said axle lever and coupled to saidaxle lever and cam for shifting the contact point between said cam andsaid balance plate projection backward and forward thus changing thetelescopic expansion of said mixing chamber and burner.

References Cited by the Examiner UNITED STATES PATENTS 1,009,678 11/11Mavrogordato 158-117 1,057,814 4/ 13 Erickson. 1,215,653 2/17 Hale158-117 1,378,071 5/21 Werlin 158117 X 1,393,481 10/21 Albrechtsen etal. 15899 2,587,334 2/52 Kronmiller 23694 X FOREIGN PATENTS 150,967 5/04Germany. 49,370 5/ 29 Norway.

JAMES W. WESTHAVER, Primary Examiner.

PERCY L. PATRICK, Examiner.

